Mining troubles 2 BTC bounty to help me solve

[max in montreal]

I have 4 cards on my MSI 890FXA-GD70. Using windows 7 32 bit.
5870 -->GPU 0
5970 -->GPU 1 and 2
5970 -->GPU 3 and 4
5970 -->GPU 5 and 6

I could mine with any 5 gpu, when I add the other 1 or 2 it will decrease the hash rate on the others. Is there a setting in the mobo bios that I should adjust?

Help me solve this problem and 2 bitcoins are yours for the taking!

[1714918272]

1714918272

[1714918272]

1714918272

[1714918272]

1714918272

[BkkCoins]

I once had a similar problem. It seemed to be linked to too much cpu usage for me. When I reverted to 11.6 driver it went away and cards stopped affecting each other. If you seem to have high cpu usage and use later than 11.6 (which has a cpu bug) then reverting may help.

[max in montreal]

Edited my post, I am using windows 7.

[bcforum]

I could mine with any 5 gpu, when I add the other 1 or 2 it will decrease the hash rate on the others. Is there a setting in the mobo bios that I should adjust?

Check your resource monitor and see if you are:

1) running out of CPU
2) running out of memory
3) running out of network bandwidth (unlikely)

[max in montreal]

Yes the CPU is at 100%, but i thought this was a CCC bug. I am running windows 7, and do not want to switch to Linux, especially since CCC can now manage 8 GPU. The memory usage is not 100%.

[k9quaint]

There is a version of Catalyst drivers that do not have the 100% CPU bug. Catalyst version 11.6 works on LInux.
On my windows box, I have driver version 8.861 from 5/24/2011 and it is barely using any CPU at all. I believe that driver is from the 11.6 Catalyst package as well.

[Elder III]

Which drivers are you using?  I find that the 11.6 drivers work the best; 11.6b if you need to be able to run more than 4... I have not done so well with 11.7 or 11.8 myself.

[max in montreal]

There is a version of Catalyst drivers that do not have the 100% CPU bug. Catalyst version 11.6 works on LInux.
On my windows box, I have driver version 8.861 from 5/24/2011 and it is barely using any CPU at all. I believe that driver is from the 11.6 Catalyst package as well.

What is the max GPU limit with these drivers?

[max in montreal]

Which drivers are you using?  I find that the 11.6 drivers work the best; 11.6b if you need to be able to run more than 4... I have not done so well with 11.7 or 11.8 myself.

I am using the latest, 11.8.

[CanaryInTheMine]

I have 4 cards on my MSI 890FXA-GD70. Using windows 7 32 bit.
5870 -->GPU 0
5970 -->GPU 1 and 2
5970 -->GPU 3 and 4
5970 -->GPU 5 and 6

I could mine with any 5 gpu, when I add the other 1 or 2 it will decrease the hash rate on the others. Is there a setting in the mobo bios that I should adjust?

Help me solve this problem and 2 bitcoins are yours for the taking!

What are the clock/memory settings and what PSU do you have these connected to?

[max in montreal]

In windows they are all at the defaults, I wanted to get them all running before I tweak.

I am using 2 PSU, one is an antec earthwatts 750, the other is an ultra x 3 1000 watt. 1000 watt is for 2 X 5970 and the 750 runs the mobo, 1 X 5970 and 1 X 5870.

Using Linuxcoin everything is seen and runs fine. So I think its not a mobo or power issue.

[CanaryInTheMine]

In windows they are all at the defaults, I wanted to get them all running before I tweak.

I am using 2 PSU, one is an antec earthwatts 750, the other is an ultra x 3 1000 watt. 1000 watt is for 2 X 5970 and the 750 runs the mobo, 1 X 5970 and 1 X 5870.

Using Linuxcoin everything is seen and runs fine. So I think its not a mobo or power issue.

uninstall CCC. you only need the drivers and SDK.

[max in montreal]

uninstalling ccc did not help. I am going to install 11.6b.

[CanaryInTheMine]

uninstalling ccc did not help. I am going to install 11.6b.

if your CPU is multicore, try setting affinity of miners to different cores.  iff this is related to CPU issues.

[max in montreal]

sempron 140

[CanaryInTheMine]

sempron 140

ohhhh.... unless you have a bit more powerfull chip to at least try to rule out if cpu is an issue i'm not sure what else to suggest...

the CPU bug is nasty....

[k9quaint]

Change your drivers. Try 11.6. Make sure you uninstall the current drivers before you install the next version.

[max in montreal]

11.6b can only see 4 gpu...

[k9quaint]

11.6b can only see 4 gpu...

Do you have dummy plugs installed on all the cards?

[max in montreal]

on 3 cards yes, the 4th is my monitor. I can see all cards in CCC.